The Tor Browser / file comparison
comparison: mobile/android/base/db/TopSitesCursorWrapper.java
mobile/android/base/db/TopSitesCursorWrapper.java
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:efedb1d3cf93 |
|---|---|
| 1 package org.mozilla.gecko.db; | |
| 2 | |
| 3 import android.database.Cursor; | |
| 4 import android.database.CursorWrapper; | |
| 5 import android.util.SparseArray; | |
| 6 | |
| 7 import org.mozilla.gecko.db.BrowserContract.Bookmarks; | |
| 8 import org.mozilla.gecko.db.BrowserDB.URLColumns; | |
| 9 | |
| 10 /** | |
| 11 * {@TopSitesCursorWrapper} is a cursor wrapper that merges | |
| 12 * the top and pinned sites cursors into one. It ensures the | |
| 13 * cursor will contain at least a given minimum number of | |
| 14 * entries. | |
| 15 */ | |
| 16 public class TopSitesCursorWrapper extends CursorWrapper { | |
| 17 | |
| 18 private static class PinnedSite { | |
| 19 public final String title; | |
| 20 public final String url; | |
| 21 | |
| 22 public PinnedSite(String title, String url) { | |
| 23 this.title = (title == null ? "" : title); | |
| 24 this.url = (url == null ? "" : url); | |
| 25 } | |
| 26 } | |
| 27 | |
| 28 // The cursor for the top sites query | |
| 29 private final Cursor topCursor; | |
| 30 | |
| 31 // Associates pinned sites and their respective positions | |
| 32 private SparseArray<PinnedSite> pinnedSites; | |
| 33 | |
| 34 // Current position of the cursor | |
| 35 private int currentPosition = -1; | |
| 36 | |
| 37 // The size of the cursor wrapper | |
| 38 private final int count; | |
| 39 | |
| 40 public TopSitesCursorWrapper(Cursor pinnedCursor, Cursor topCursor, int minSize) { | |
| 41 super(topCursor); | |
| 42 | |
| 43 setPinnedSites(pinnedCursor); | |
| 44 this.topCursor = topCursor; | |
| 45 | |
| 46 count = Math.max(minSize, pinnedSites.size() + topCursor.getCount()); | |
| 47 } | |
| 48 | |
| 49 public void setPinnedSites(Cursor c) { | |
| 50 pinnedSites = new SparseArray<PinnedSite>(); | |
| 51 | |
| 52 if (c == null) { | |
| 53 return; | |
| 54 } | |
| 55 | |
| 56 try { | |
| 57 if (c.getCount() <= 0) { | |
| 58 return; | |
| 59 } | |
| 60 | |
| 61 c.moveToPosition(0); | |
| 62 do { | |
| 63 final int pos = c.getInt(c.getColumnIndex(Bookmarks.POSITION)); | |
| 64 final String url = c.getString(c.getColumnIndex(URLColumns.URL)); | |
| 65 final String title = c.getString(c.getColumnIndex(URLColumns.TITLE)); | |
| 66 pinnedSites.put(pos, new PinnedSite(title, url)); | |
| 67 } while (c.moveToNext()); | |
| 68 } finally { | |
| 69 c.close(); | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 public boolean hasPinnedSites() { | |
| 74 return (pinnedSites != null && pinnedSites.size() > 0); | |
| 75 } | |
| 76 | |
| 77 public PinnedSite getPinnedSite(int position) { | |
| 78 if (!hasPinnedSites()) { | |
| 79 return null; | |
| 80 } | |
| 81 | |
| 82 return pinnedSites.get(position); | |
| 83 } | |
| 84 | |
| 85 public boolean isPinned() { | |
| 86 return (pinnedSites.get(currentPosition) != null); | |
| 87 } | |
| 88 | |
| 89 private int getPinnedBefore(int position) { | |
| 90 int numFound = 0; | |
| 91 if (!hasPinnedSites()) { | |
| 92 return numFound; | |
| 93 } | |
| 94 | |
| 95 for (int i = 0; i < position; i++) { | |
| 96 if (pinnedSites.get(i) != null) { | |
| 97 numFound++; | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 return numFound; | |
| 102 } | |
| 103 | |
| 104 @Override | |
| 105 public int getPosition() { | |
| 106 return currentPosition; | |
| 107 } | |
| 108 | |
| 109 @Override | |
| 110 public int getCount() { | |
| 111 return count; | |
| 112 } | |
| 113 | |
| 114 @Override | |
| 115 public boolean isAfterLast() { | |
| 116 return (currentPosition >= count); | |
| 117 } | |
| 118 | |
| 119 @Override | |
| 120 public boolean isBeforeFirst() { | |
| 121 return (currentPosition < 0); | |
| 122 } | |
| 123 | |
| 124 @Override | |
| 125 public boolean isLast() { | |
| 126 return (currentPosition == count - 1); | |
| 127 } | |
| 128 | |
| 129 @Override | |
| 130 public boolean moveToNext() { | |
| 131 return moveToPosition(currentPosition + 1); | |
| 132 } | |
| 133 | |
| 134 @Override | |
| 135 public boolean moveToPrevious() { | |
| 136 return moveToPosition(currentPosition - 1); | |
| 137 } | |
| 138 | |
| 139 @Override | |
| 140 public boolean move(int offset) { | |
| 141 return moveToPosition(currentPosition + offset); | |
| 142 } | |
| 143 | |
| 144 @Override | |
| 145 public boolean moveToFirst() { | |
| 146 return moveToPosition(0); | |
| 147 } | |
| 148 | |
| 149 @Override | |
| 150 public boolean moveToLast() { | |
| 151 return moveToPosition(count - 1); | |
| 152 } | |
| 153 | |
| 154 @Override | |
| 155 public boolean moveToPosition(int position) { | |
| 156 currentPosition = position; | |
| 157 | |
| 158 // Move the real cursor as if we were stepping through it to this position. | |
| 159 // Account for pinned sites, and be careful to update its position to the | |
| 160 // minimum or maximum position, even if we're moving beyond its bounds. | |
| 161 final int before = getPinnedBefore(position); | |
| 162 final int p2 = position - before; | |
| 163 | |
| 164 if (p2 <= -1) { | |
| 165 super.moveToPosition(-1); | |
| 166 } else if (p2 >= topCursor.getCount()) { | |
| 167 super.moveToPosition(topCursor.getCount()); | |
| 168 } else { | |
| 169 super.moveToPosition(p2); | |
| 170 } | |
| 171 | |
| 172 return (!isBeforeFirst() && !isAfterLast()); | |
| 173 } | |
| 174 | |
| 175 @Override | |
| 176 public long getLong(int columnIndex) { | |
| 177 if (hasPinnedSites()) { | |
| 178 final PinnedSite site = getPinnedSite(currentPosition); | |
| 179 | |
| 180 if (site != null) { | |
| 181 return 0; | |
| 182 } | |
| 183 } | |
| 184 | |
| 185 if (!super.isBeforeFirst() && !super.isAfterLast()) { | |
| 186 return super.getLong(columnIndex); | |
| 187 } | |
| 188 | |
| 189 return 0; | |
| 190 } | |
| 191 | |
| 192 @Override | |
| 193 public int getInt(int columnIndex) { | |
| 194 if (hasPinnedSites()) { | |
| 195 final PinnedSite site = getPinnedSite(currentPosition); | |
| 196 | |
| 197 if (site != null) { | |
| 198 return 0; | |
| 199 } | |
| 200 } | |
| 201 | |
| 202 if (!super.isBeforeFirst() && !super.isAfterLast()) { | |
| 203 return super.getInt(columnIndex); | |
| 204 } | |
| 205 | |
| 206 return 0; | |
| 207 } | |
| 208 | |
| 209 @Override | |
| 210 public String getString(int columnIndex) { | |
| 211 if (hasPinnedSites()) { | |
| 212 final PinnedSite site = getPinnedSite(currentPosition); | |
| 213 | |
| 214 if (site != null) { | |
| 215 if (columnIndex == topCursor.getColumnIndex(URLColumns.URL)) { | |
| 216 return site.url; | |
| 217 } else if (columnIndex == topCursor.getColumnIndex(URLColumns.TITLE)) { | |
| 218 return site.title; | |
| 219 } | |
| 220 | |
| 221 return ""; | |
| 222 } | |
| 223 } | |
| 224 | |
| 225 if (!super.isBeforeFirst() && !super.isAfterLast()) { | |
| 226 return super.getString(columnIndex); | |
| 227 } | |
| 228 | |
| 229 return ""; | |
| 230 } | |
| 231 } |
